Mahmoud A Hamamsy

Title: **Mahmoud A Hamamsy: Innovator in Photodiode Technology**

Introduction

Mahmoud A Hamamsy is a distinguished inventor based in Watchung, NJ, who has significantly contributed to the field of photodiode technology. With two patents to his name, Hamamsy's innovations demonstrate a keen understanding of semiconductor devices and their applications.

Latest Patents

Hamamsy's latest patents include groundbreaking inventions focused on improving efficiency and reliability in electronic components.

1. **Restricted contact planar photodiode**: This invention details a back-illuminated InGaAs photodiode that incorporates a unique double layer of silicon nitride on the front surface. This design serves multiple functions, such as surface passivation, diffusion masking for the p-n junction, and forming a restricted area contact to mitigate leakage currents, enhancing device reliability. The innovative contact geometry includes a narrow pedestal zone and a wider cap portion that protects the surface from contaminants, showcasing Hamamsy's expertise in optimizing photonic devices.

2. **Optically toggled latch-free normally off switch**: This patent describes a normally-OFF switch that integrates a transistor branch path with a parallel pair of oppositely poled thyristor branches. This design protects against voltage surges by minimizing latching-on of the thyristors. Light-emitting diodes activate in response to excessive currents and trigger a photodiode array that directs excess current away from the thyristors, significantly improving circuit protection.

Career Highlights

Throughout his career, Hamamsy has held prominent positions at several notable companies. He has worked with American Telephone & Telegraph Co., AT&T Bell Laboratories, and Bell Telephone Laboratories, contributing to various technological advances in telecommunications and electronic manufacturing.

Collaborations

In his professional journey, Hamamsy has collaborated with distinguished colleagues such as Stephen R Forrest and John R Zuber, furthering the exchange of ideas and fostering innovation within the industry.

Conclusion

Mahmoud A Hamamsy's inventive contributions mark him as an influential figure in the realm of photodiode technology. Through his patents, he has addressed critical challenges in semiconductor efficiency and reliability, positioning himself as an innovator whose work continues to inspire advancements in electronic devices.